A Vietnam Era helicopter, YL-37, will be at the Iowa Aviation Museum/Greenfield Municipal Airport the afternoon of Sunday, July 30th. It is expected to land between 12-1 PM and remain throughout the afternoon. Plans are subject to weather conditions and other issues beyond the control of the aviation museum. If you have questions, call the Iowa Aviation Museum at 641-343-7184. Updates will be posted on the Iowa Aviation Museum Facebook page.